A good idea is to pick up a soft bait outfit.
Drop your longline and drift about with the soft bait outfit while you wait, you might do better than the longline does and have more fun.
For bait option stick with tougher baits like trevally, mullet, skipjack, and make sure the hooks go through the skin. Soft baits like pilchards tend to get cleaned off the hooks too easily on an ‘unmanned’ line. Baiting 2 options on alternative hooks,. Ie 1 mullet, 1 squid, 1 mullet, 1 squid is popular and covers your bases.